this question may sound little weird but is it possible to turn off all materials at once to render preview?
I have one big scene completely textured, I thought it is done once for all, but now I would like to major redo lighting. It would be easier if I can make preview render without materials , just shade objects and lights and shadows as I can better see where all shadows go and judge intensity non influenced by diffuse colors.
Unfortunatelly I didnĀ“t figured out how to do this without need manualy unlinking materials one by one and than link again
If someone have idea I will be grateful for it.
Thanx
Ok, what you could do is make a full copy of the Scene.
Delete the material of the Active object.
Select all the other object (while still keeping the same active object)
Ctrl-L -> Materials.